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arXiv 1012.3004cond-mat.mes-hall
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热激活单电子输运冷却纳米机械谐振腔

Cooling of nanomechanical resonator by thermally activated single-electron transport

F. Santandrea, L. Y. Gorelik, R. I. Shekhter, M. Jonson

摘要:

我们表明,纳米机械谐振器的振动可以冷却到其量子基态附近的隧道注入的电子从STM尖端。用于耦合电子和机械自由度的两种机制之间的相互作用导致在隧穿期间振动子发射和吸收的概率幅度之间的偏置电压依赖性差异。对于一个偏置电压低于库仑阻塞阈值,我们发现,吸收占主导地位,这导致冷却对应的平均振子人口的基本弯曲模式为0.2。

英文摘要:

We show that the vibrations of a nanomechanical resonator can be cooled to near its quantum ground state by tunnelling injection of electrons from an STM tip. The interplay between two mechanisms for coupling the electronic and mechanical degrees of freedom results in a bias-voltage dependent difference between the probability amplitudes for vibron emission and absorption during tunneling. For a bias voltage just below the Coulomb blockade threshold we find that absorption dominates, which leads to cooling corresponding to an average vibron population of the fundamental bending mode of 0.2.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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